A well-designed midboss can easily be more memorable than an area's final boss.

Conversely, a bland midboss – take for example, most boss fights in Devil May Cry 2 – is easily forgettable, and you're neither richer nor poorer for the experience, save for the notion that your time could have been better spent doing most anything else.

Dom reviewed a roguelike called MidBoss, and there's a chance he feels it falls into one of these categories. But I won't spoil it for you.